题解 | 截取出年龄
截取出年龄
https://www.nowcoder.com/practice/b8d8a87fe1fc415c96f355dc62bdd12f
select SUBSTRING_INDEX(SUBSTRING_INDEX(profile,',',-2),',',1) AS age, count(*) as number from user_submit group by age
截取出年龄
https://www.nowcoder.com/practice/b8d8a87fe1fc415c96f355dc62bdd12f
select SUBSTRING_INDEX(SUBSTRING_INDEX(profile,',',-2),',',1) AS age, count(*) as number from user_submit group by age
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